Removed a stray %-sign from a comment.

diff --git a/magick/blob.c b/magick/blob.c
index af70445..6114cc2 100644
--- a/magick/blob.c
+++ b/magick/blob.c
@@ -1429,7 +1429,7 @@
 %
 %  ImageToBlob() implements direct to memory image formats.  It returns the
 %  image as a formatted blob and its length.  The magick member of the Image
-%  structure %  determines the format of the returned blob (GIF, JPEG, PNG,
+%  structure determines the format of the returned blob (GIF, JPEG, PNG,
 %  etc.).  This method is the equivalent of WriteImage(), but writes the
 %  formatted "file" to a memory buffer rather than to an actual file.
 %